发芽率

The chloroform phase was isolated into 7 phases by column chromatograpathy, and the bioassy showed that the 1 phase has strong inhibitory effect, was 91.01% on Abutilon theophrasti M., root length, 51.35%、63.93%on Echinochloa crusgalli L, seedling length and root length, and the Amaranthus retroflexux L.,germination rate is 0, the secondly was 2 phase and 5 phas, and next we continued iaolated these two phases.

用硅胶柱对氯仿组分进行分离得到7个组分，生物测定表明组分1化感作用最强，对苘麻根长抑制率为91.01%，对稗草芽长和根长的抑制率分别为51.35%、63.93%，反枝苋的发芽率为0；其次是组分2和组分5，由于组分2的含量相对较少，对组分1和组分5继续分离。

It,s allelchemicals were isolated through extraction, thin-layer chromatography, and column chromatograpathy. After the white clover was infused in ethanol and evaporation, the leavings was dissolved by water. The aqueous extract was extracted by petroleum,chloroform, ethyl acetate and n-Butanol successively, and the bioassay showed that the chloroform phase has obvious inhibitory effect, the inhibitory rate was 44.32%,88.08% on Abutilon theophrasti M., seedling length and root length, 82.08%,92.16% on Echinochloa crusgalli L., seedling length and root length, and the Amaranthus retroflexux L., germination rate is 0, the secondly was ethyl acetate phase.

运用萃取、薄层层析、柱层析等方法对白三叶草地上部分的化感物质进行初步分离，结果表明，白三叶草经乙醇浸提旋转蒸发后用蒸馏水溶解，依次用石油醚、氯仿、乙酸乙酯、正丁醇萃取，生物测定表明氯仿组分对杂草的抑制作用最强，对苘麻芽长和根长抑制率分别为44.32%、88.08%，对稗草芽长和根长的抑制率分别为82.08%、92.16%，反枝苋的发芽率为0；其次是乙酸乙酯相。

The natural distributing populations of the indigenous timber species--Cordia africana that grew in and around the area of Mizan Teferi in Ethiopia were investigated. Bulk seed samples were selected from ten phenotypically superior trees in different natural populations. They were evaluated through the performance of their half-sibs and especially examined for variability in seed morphometrics, seed germination, and seedling growth at nursery stage.

通过对埃塞俄比亚Mizan Teferi及周边地区生长的乡土用材树种--非洲破布木自然种群分布情况调查，筛选了10株生长表现型较好的优良母树，采集了大量的供试种子样品，并对其种子外部特征和在苗圃中的发芽率和种苗生长表现进行了观察和分析对比。

This paper studied the preliminary research of biology characteristics of 8 provenance of the Ailanthus altissima Swingle .

对臭椿的8个种源的种子生物学特性变异进行了初步研究，测定指标包括种子形态、千粒重、净度、含水率、发芽率、发芽势、平均发芽速度和活力指数。

Using Rudbeckia hirta,Coreopsis drummondii,Callistephus chinensis, Althaea rosea ,four kinds of ornamental plant seeds as the test materials,treated with NaCl and Na2SO4 double salt solutions of different concentrations,and the relative germination percentage,root length,simply vigour index,synthetic inhibitory effect were measured to determine the effect of salt stress on seed germination.

以黑心菊、金鸡菊、翠菊、蜀葵4种花卉种子为材料，研究不同浓度NaCl和Na2SO4复盐溶液处理下种子及幼苗的耐盐性，并观察其相对发芽率、根长、简易活力指数、综合效应。

Tolerance to pre-harvest sprouting of RSP was examined by four ways in 6 different growing period after anthesis.

通过对RSP不同灌浆期及不同发芽处理研究表明，在开花后35d的穗发芽高峰期其发芽率也仅为6.06%。

Although low NaC1 concentration (0.05 mol/L) could promote the frozen seed's germination rate, germination index and vigor index, the germination of Atriplex canescens seeds could be inhibited by NaC1stress.

尽管低浓度的NaCl(0.05mol/L)处理下冷藏种子发芽率、发芽指数和活力指数均高于对照，但盐胁迫会抑制四翅滨藜种子的发芽。

In a commercial nursery using the peat moss-plug system, these three strains also showed their ability to promote seedling growth following either seed bacterization or peat moss drenching, and their populations in peat moss maintained at high levels (except strain RS65 for 30 min seed soaking ) within 21 days after seeding. The above 14 strains that were capable of promoting tomato growth were tested for their ability to control bacterial wilt of tomato.

自台湾中部不同地区数种作物分离得到之396株根栖细菌，被覆於番茄种子后，利用套袋塑胶培养皿之系统及含泥炭土栽培介质之穴盘系统於生长箱筛选，共有 14株菌株在重复筛选过程中均能提高种子发芽率及促进根生长之效果，其中RS4、RS65及RS70三菌株表现最佳，可增加根长度、茎长度、植株鲜重及乾重(RS65菌株除外)。

The development of them is restricted by the unsuitable climate and soil, which shows in the difficulties in bourgeon and low germination rate of seeds.

而且由于气候和土壤的不适，种子萌发困难，发芽率低，严重威胁了这一树种的生存和发展。

For the same variety, low temperature affected the bourgeon course of it seed and the seed emergence was stayed off, especially when the seed had low vigor.

结果表明，各样品的发芽势、发芽率和发芽指数和活力指数指标均在20~32.5℃范围内随着温度的升高而升高，达到一定的温度后出现下降趋势。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。